Book o Abs ac s submi ed o he IV Cong ess o Ma ine
Sciences. Las Palmas de G an Cana ia, June 11
h
o 13
h
Ti le: Book o Abs ac s submi ed o he IV Cong ess o Ma ine Sciences. Las Palmas
de G an Cana ia, June 11 h o 13 h. 488 pp.
ISBN - 10: 84-697-0471-0
ISBN - 13: 978-84-697-0471-4
Pos e ’s Abs ac s
The s iped soldie sh imp Plesionika edwa dsii (C us acea: Decapoda: Pandalidae) om he Cape
Ve de Islands
Ga c´
ıa-Ma ´
ın, V.1, R. T iay-Po ella1, A. Ma ins2, N. Almeida3, C. Mon ei o2, S. Co eia2, G.
Gonz´
alez-Lo enzo4, S. Jim´
enez4, J.I. San ana1, J.G. Pajuelo1, J.M. Lo enzo1& J.A. Gonz´
alez1
1G upo de Ecolog´
ıa Ma ina Aplicada y Pesque ´
ıas, Uni e sidad de Las Palmas de G an Cana ia, Spain
2Ins i u o Nacional de Desen ol imen o das Pescas (INDP) de Cabo Ve de
3Depa amen o de Engenha ia e Ciˆ
encias do Ma (DECM), Uni e sidade de Cabo Ve de (Uni-CV)
4Cen o Oceanog ´
a ico de Cana ias, Ins i u o Espa˜
nol de Oceanog a ´
ıa, Spain.
Abs ac
This s udy is pa o he PROACTIVA 1-2 (2009-2012) and MARPROF-CV (2010-2014) p ojec s, in he
amewo k o he Cana y Islands Go e nmen and UE PCT MAC 2007-2013 p og ammes espec i ely.
Resea ch has mainly ocused on he s ock assessmen o he s iped soldie sh imp, Plesionika edwa dsii
(B and , 1851), because i has shown mode a e o high le els o ishing yield and abundances compa ible
wi h he de elopmen o a new sus ainable ishe y in he Cape Ve de Islands.
C uises ook place on boa d he R/V P o . Ignacio Lozano. Fou 15-day su eys ha e been conduc ed o
da e: Cabo Ve de 2010-04 (Ap il 2010), Cama ˜
ao-1 (No embe 2011), Cama ˜
ao-2 (Ma s 2012) and Ca-
ma ˜
ao-3 (July 2012). An inno a i e ishing gea so-called mul iple semi- loa ing sh imp ap (MSFST)
was used. Each ishing line was composed by 40-65 aps ope a ing a ound 2.4 m abo e he sea loo ,
using Decap e us maca ellus (Ca angidae) as unique bai o he aps. Fishing dep h was 66-458 m, and
e ec i e ishing ime was 16-18 h. Each ap was a ached o he main bo om line e e y 15 m, and he
maximum a ac ion o his bai was es ablished o be 100 o 150 m, acco ding o he expe ience gained
om he local ishe y o deep-sea lobs e s. So densi y by a ea was calcula ed assuming wo di e en
a eas o a ac ion o he ishing gea . Ini ial biomass was es ima ed om deple ion expe imen s a di e -
en abundance s a ions by applying he Leslie & Da is (1939) me hod, modi ied by Ricke (1975). Each
ishing ope a ion was classi ied acco ding o i s yield (CPUE in g/ ap/nigh ). The po en ial ishing plana
a ea was es ima ed be ween he isoba hyme ic lines be ween 90 and 220 m. To al biomasses (B ) we e
calcula ed om a eas (km2) and mean minimum/maximum densi ies (kg/km2). Maximum sus ainable
yield (MSY) was es ima ed om B using he Bedding on and Cooke (1983) model by en e ing na u al
mo ali y (0.6), g ow h a e (0.53 yea 1) and ec ui men age (1.32 yea ), which a e he pa ame e s o
his a ge species published o he Cana ies. These pa ame e s es ima e a biological exploi a ion a e
() o 0.262. In e pola ions we e applied o es ima e MSY o insula s ocks ep esen ing lesse han 5%
o he o al ishing g ounds o his species in he a chipelago.
The MSY es ima ed by deple ion we e 30.5 ons/yea o he s ock o S˜
ao Vicen e, San a Luzia, Ilheus
and S˜
ao Nicolau, 10 ons/yea o he s ock o San iago, 138.8 ons/yea o he s ock o Boa Vis a
and Maio, and 5.6 ons/yea o he s ock o Sal. The small s ocks es ima ed by in e pola ion we e:
4.5 ons/yea o he s ock o San o An ˜
ao, 1.3 ons/yea o he s ock o Fogo, and 1.8 ons/yea o
he s ock o B a a and Ilheus. In o al, 192.5 ons pe yea was he o al MSY o he s iped soldie
sh imp a ound he islands o he Cape Ve de a chipelago, occupying a o al a ea o 1,918 km2o new
ishing g ounds a be ween 90 and 220 m o dep h. In compa ison wi h he adi ional bo om ap
used in he Cana y Islands, he inno a i e ishing gea MSFST we e p o ed o be mo e selec i e o
pandalid sh imps, minimizing he gea impac on he sea loo as well as he by-ca ch by educing he
disca ds. Deple ion me hods a e based on he assump ion o a closed sys em, ha is wi h minimum o
ze o immig a ion be ween neighbou ing a eas. The s aigh o wa d decline o CPUEs ob ained du ing
he deple ion expe imen s seems o con i m ha P. edwa dsii is a low mobili y species, making his
assump ion alid a leas du ing sho - ime pe iods. Because o he ba hyme y p o ile o hese islands,
Wednesday, June 11 h 295
Pos e ’s Abs ac s
he dep h ange is om e y close ( ew nau ical miles in San iago) o a away (10-12 n.m. in Boa Vis a)
o he coas line.
Fishing e o should be con olled on he basis o quo as, numbe o ishing essels and a p ecau iona y
app oach in o de o ensu e ha ca ching is commensu a e wi h sus ainable le els o exploi a ion. MSY
es ima es sugges ha his new Cape e dean ishe y should be ca ied ou by specialized medium-sized
ishing essels. Du ing he las decades a combina ion o sh imp awling and indus ial apping ac i i y
has h ea ened o e -exploi a ion in he Medi e anean ishe ies a ge ing on P. edwa dsii; cu en ly he
sh imp collapse has conduc ed o he decline o hese ishe ies. Can he Cape Ve de egula o y bodies
and all he s akeholde s in ol ed lea n he lessons his eaches us abou his esou ce managemen ?
296 Wednesday, June 11 h
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